NOTE: The WIN32_REDIST_DIR is because we don't have jemalloc support for VS2010; we do have support for it in VS2008 and VS2005 (therefore you won't need the WIN32_REDIST_DIR line). For VS2005 use start-msvc8-x64.bat and for VS2008 use start-msvc9-x64.bat (NOTE I have not tested it myself).

I hope this helps you out,
Armen

EDIT: I had to switch VS2005 and VS2008 in the last note of this post. I had them switched. Thanks Makoto!